Related Clues:

• One hiding in a ship
• He has a secret passage
• Remove, after a second, an unwanted passenger
• Travel secretly
• Person hiding on ship
• Sneak on board with son to recover after breakdown
• Illegal passenger's expressions of pain and disgust going into hold
• Nautical freeloader
• Stop-start Operation Freeflow tactic for one of those attracted to free travel
• School draw is a way of getting a free holiday
• One has got on unexpectedly
• Nautical nuisance
• Clandestine boarder observed circling tug, always
• Unauthorised passenger
• Secret tripper's pack?